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Unified Diff: src/runtime.cc

Issue 240253003: Remove uses of MaybeObject in runtime.cc. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: changed as suggested Created 6 years, 8 months ago
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Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index ab3332a2feffc712f9ab8a960aca53b720130307..6b2b0096c1d5c397be94875d046fdfe93c702d61 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -7045,6 +7045,7 @@ static inline void StringBuilderConcatHelper(String* special,
sinkchar* sink,
FixedArray* fixed_array,
int array_length) {
+ DisallowHeapAllocation no_gc;
int position = 0;
for (int i = 0; i < array_length; i++) {
Object* element = fixed_array->get(i);
@@ -7079,36 +7080,13 @@ static inline void StringBuilderConcatHelper(String* special,
}
-RUNTIME_FUNCTION(MaybeObject*, Runtime_StringBuilderConcat) {
- HandleScope scope(isolate);
- ASSERT(args.length() == 3);
- CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
- if (!args[1]->IsSmi()) return isolate->ThrowInvalidStringLength();
- int array_length = args.smi_at(1);
- CONVERT_ARG_HANDLE_CHECKED(String, special, 2);
-
- // This assumption is used by the slice encoding in one or two smis.
- ASSERT(Smi::kMaxValue >= String::kMaxLength);
-
- JSObject::EnsureCanContainHeapObjectElements(array);
-
- int special_length = special->length();
- if (!array->HasFastObjectElements()) {
- return isolate->Throw(isolate->heap()->illegal_argument_string());
- }
- FixedArray* fixed_array = FixedArray::cast(array->elements());
- if (fixed_array->length() < array_length) {
- array_length = fixed_array->length();
- }
-
- if (array_length == 0) {
- return isolate->heap()->empty_string();
- } else if (array_length == 1) {
- Object* first = fixed_array->get(0);
- if (first->IsString()) return first;
- }
-
- bool one_byte = special->HasOnlyOneByteChars();
+// Returns the result length of the concatenation.
+// On illegal argument, -1 is returned.
+static inline int StringBuilderConcatLength(int special_length,
+ FixedArray* fixed_array,
+ int array_length,
+ bool* one_byte) {
+ DisallowHeapAllocation no_gc;
int position = 0;
for (int i = 0; i < array_length; i++) {
int increment = 0;
@@ -7127,66 +7105,97 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_StringBuilderConcat) {
len = -smi_value;
// Get the position and check that it is a positive smi.
i++;
- if (i >= array_length) {
- return isolate->Throw(isolate->heap()->illegal_argument_string());
- }
+ if (i >= array_length) return -1;
Object* next_smi = fixed_array->get(i);
- if (!next_smi->IsSmi()) {
- return isolate->Throw(isolate->heap()->illegal_argument_string());
- }
+ if (!next_smi->IsSmi()) return -1;
pos = Smi::cast(next_smi)->value();
- if (pos < 0) {
- return isolate->Throw(isolate->heap()->illegal_argument_string());
- }
+ if (pos < 0) return -1;
}
ASSERT(pos >= 0);
ASSERT(len >= 0);
- if (pos > special_length || len > special_length - pos) {
- return isolate->Throw(isolate->heap()->illegal_argument_string());
- }
+ if (pos > special_length || len > special_length - pos) return -1;
increment = len;
} else if (elt->IsString()) {
String* element = String::cast(elt);
int element_length = element->length();
increment = element_length;
- if (one_byte && !element->HasOnlyOneByteChars()) {
- one_byte = false;
+ if (*one_byte && !element->HasOnlyOneByteChars()) {
+ *one_byte = false;
}
} else {
ASSERT(!elt->IsTheHole());
- return isolate->Throw(isolate->heap()->illegal_argument_string());
+ return -1;
}
if (increment > String::kMaxLength - position) {
- return isolate->ThrowInvalidStringLength();
+ return kMaxInt; // Provoke throw on allocation.
}
position += increment;
}
+ return position;
+}
- int length = position;
- Object* object;
- if (one_byte) {
- { MaybeObject* maybe_object =
- isolate->heap()->AllocateRawOneByteString(length);
- if (!maybe_object->ToObject(&object)) return maybe_object;
+RUNTIME_FUNCTION(MaybeObject*, Runtime_StringBuilderConcat) {
+ HandleScope scope(isolate);
+ ASSERT(args.length() == 3);
+ CONVERT_ARG_HANDLE_CHECKED(JSArray, array, 0);
+ if (!args[1]->IsSmi()) return isolate->ThrowInvalidStringLength();
+ int array_length = args.smi_at(1);
+ CONVERT_ARG_HANDLE_CHECKED(String, special, 2);
+
+ // This assumption is used by the slice encoding in one or two smis.
+ ASSERT(Smi::kMaxValue >= String::kMaxLength);
+
+ JSObject::EnsureCanContainHeapObjectElements(array);
+
+ int special_length = special->length();
+ if (!array->HasFastObjectElements()) {
+ return isolate->Throw(isolate->heap()->illegal_argument_string());
+ }
+
+ int length;
+ bool one_byte = special->HasOnlyOneByteChars();
+
+ { DisallowHeapAllocation no_gc;
+ FixedArray* fixed_array = FixedArray::cast(array->elements());
+ if (fixed_array->length() < array_length) {
+ array_length = fixed_array->length();
+ }
+
+ if (array_length == 0) {
+ return isolate->heap()->empty_string();
+ } else if (array_length == 1) {
+ Object* first = fixed_array->get(0);
+ if (first->IsString()) return first;
}
- SeqOneByteString* answer = SeqOneByteString::cast(object);
+ length = StringBuilderConcatLength(
+ special_length, fixed_array, array_length, &one_byte);
+ }
+
+ if (length == -1) {
+ return isolate->Throw(isolate->heap()->illegal_argument_string());
+ }
+
+ if (one_byte) {
+ Handle<SeqOneByteString> answer;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, answer,
+ isolate->factory()->NewRawOneByteString(length));
StringBuilderConcatHelper(*special,
answer->GetChars(),
- fixed_array,
+ FixedArray::cast(array->elements()),
array_length);
- return answer;
+ return *answer;
} else {
- { MaybeObject* maybe_object =
- isolate->heap()->AllocateRawTwoByteString(length);
- if (!maybe_object->ToObject(&object)) return maybe_object;
- }
- SeqTwoByteString* answer = SeqTwoByteString::cast(object);
+ Handle<SeqTwoByteString> answer;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, answer,
+ isolate->factory()->NewRawTwoByteString(length));
StringBuilderConcatHelper(*special,
answer->GetChars(),
- fixed_array,
+ FixedArray::cast(array->elements()),
array_length);
- return answer;
+ return *answer;
}
}
@@ -8814,10 +8823,7 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_Call) {
}
for (int i = 0; i < argc; ++i) {
- MaybeObject* maybe = args[1 + i];
- Object* object;
- if (!maybe->To<Object>(&object)) return maybe;
- argv[i] = Handle<Object>(object, isolate);
+ argv[i] = Handle<Object>(args[1 + i], isolate);
}
Handle<JSReceiver> hfun(fun);
@@ -9716,9 +9722,11 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileString) {
// Compile source string in the native context.
ParseRestriction restriction = function_literal_only
? ONLY_SINGLE_FUNCTION_LITERAL : NO_PARSE_RESTRICTION;
- Handle<JSFunction> fun = Compiler::GetFunctionFromEval(
- source, context, SLOPPY, restriction, RelocInfo::kNoPosition);
- RETURN_IF_EMPTY_HANDLE(isolate, fun);
+ Handle<JSFunction> fun;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, fun,
+ Compiler::GetFunctionFromEval(
+ source, context, SLOPPY, restriction, RelocInfo::kNoPosition));
return *fun;
}
@@ -9745,10 +9753,12 @@ static ObjectPair CompileGlobalEval(Isolate* isolate,
// Deal with a normal eval call with a string argument. Compile it
// and return the compiled function bound in the local context.
static const ParseRestriction restriction = NO_PARSE_RESTRICTION;
- Handle<JSFunction> compiled = Compiler::GetFunctionFromEval(
- source, context, strict_mode, restriction, scope_position);
- RETURN_IF_EMPTY_HANDLE_VALUE(isolate, compiled,
- MakePair(Failure::Exception(), NULL));
+ Handle<JSFunction> compiled;
+ ASSIGN_RETURN_ON_EXCEPTION_VALUE(
+ isolate, compiled,
+ Compiler::GetFunctionFromEval(
+ source, context, strict_mode, restriction, scope_position),
+ MakePair(Failure::Exception(), NULL));
return MakePair(*compiled, *receiver);
}
@@ -12771,29 +12781,32 @@ MUST_USE_RESULT static MaybeHandle<JSObject> MaterializeArgumentsObject(
// Compile and evaluate source for the given context.
-static MaybeObject* DebugEvaluate(Isolate* isolate,
- Handle<Context> context,
- Handle<Object> context_extension,
- Handle<Object> receiver,
- Handle<String> source) {
+static MaybeHandle<Object> DebugEvaluate(Isolate* isolate,
+ Handle<Context> context,
+ Handle<Object> context_extension,
+ Handle<Object> receiver,
+ Handle<String> source) {
if (context_extension->IsJSObject()) {
Handle<JSObject> extension = Handle<JSObject>::cast(context_extension);
Handle<JSFunction> closure(context->closure(), isolate);
context = isolate->factory()->NewWithContext(closure, context, extension);
}
- Handle<JSFunction> eval_fun =
+ Handle<JSFunction> eval_fun;
+ ASSIGN_RETURN_ON_EXCEPTION(
+ isolate, eval_fun,
Compiler::GetFunctionFromEval(source,
context,
SLOPPY,
NO_PARSE_RESTRICTION,
- RelocInfo::kNoPosition);
- RETURN_IF_EMPTY_HANDLE(isolate, eval_fun);
+ RelocInfo::kNoPosition),
+ Object);
Handle<Object> result;
- ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ ASSIGN_RETURN_ON_EXCEPTION(
isolate, result,
- Execution::Call(isolate, eval_fun, receiver, 0, NULL));
+ Execution::Call(isolate, eval_fun, receiver, 0, NULL),
+ Object);
// Skip the global proxy as it has no properties and always delegates to the
// real global object.
@@ -12803,7 +12816,7 @@ static MaybeObject* DebugEvaluate(Isolate* isolate,
// Clear the oneshot breakpoints so that the debugger does not step further.
isolate->debug()->ClearStepping();
- return *result;
+ return result;
}
@@ -12867,13 +12880,10 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugEvaluate) {
context = isolate->factory()->NewWithContext(function, context, materialized);
Handle<Object> receiver(frame->receiver(), isolate);
- Object* evaluate_result_object;
- { MaybeObject* maybe_result =
- DebugEvaluate(isolate, context, context_extension, receiver, source);
- if (!maybe_result->ToObject(&evaluate_result_object)) return maybe_result;
- }
-
- Handle<Object> result(evaluate_result_object, isolate);
+ Handle<Object> result;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, result,
+ DebugEvaluate(isolate, context, context_extension, receiver, source));
// Write back potential changes to materialized stack locals to the stack.
UpdateStackLocalsFromMaterializedObject(
@@ -12915,7 +12925,11 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_DebugEvaluateGlobal) {
// debugger was invoked.
Handle<Context> context = isolate->native_context();
Handle<Object> receiver = isolate->global_object();
- return DebugEvaluate(isolate, context, context_extension, receiver, source);
+ Handle<Object> result;
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+ isolate, result,
+ DebugEvaluate(isolate, context, context_extension, receiver, source));
+ return *result;
}
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